Vodacom upgrade

I went in to the Vodashop in Somerset mall to upgrade. I requested a samsung note 8 and a gear s3 as device. I was given a the monthly subscription amount and I gave them instruction to proceed. They informed me that they had to order the gear s3 as they had no stock. About two weeks later a received a call to inform me that the phone and gear has arrived and I must come in to finish the upgrade. When I arrived I was told that I can not upgrade with the note 8 and gear s3 anymore as the deal had expired????? Surely the devices was ordered before the deal expired??? Why phone me to inform me the devices has arrived but I can not get it anymore?? This does not make any sense! Really pathetic service. I am now seriously considering waiting another month and a half and changing service provider.